typedef bool (*ConvertFunc)(const std::string& from, const std::string& to, int flag); 等于 using ConvertFunc = bool(*)(const std::string& from, const std::string& to, int flag); typedef std::vector<std::pair<std::string, unsigned short>> HostContainer; 等于 using HostContainer =...
而C++11中:usingUPtrMapSS = std::unique_ptr<std::unordered_map<std::string, std::string>>; 或许从这个例子中,我们是看不出来明显的好处的(而于我来说,以一个第三者的角度,这个例子也难以说服我一定要用C++11的using)。 再来看下: typedefvoid(*FP)(int,conststd::string&); 若不是特别熟悉函数指针...
相关知识点: 试题来源: 解析 A解析:题目要求先比较m的大小。其次比较n的大小,首先看函数定义bool operator>(Pairp)corlst,从中可以看出B)和D)选项和函数定义不一致,缺少const,故排除;选项c只有一层比较不符合题意,故排除C)选项。因此,本题答案为A)。反馈 收藏 ...
有如下程序:#includeusingnamespacestd;classPair{intm,n;public;Pair(intj,intk):m(j),n(k){}intget(){returnIn;}intget()const{returnm n;}};intmain(){Paira(3,5);constPairb(3,5);cout$amp;A.33B.38C.83D.88
using String = std::string; using namespace std; class My { public: My() {}; void fun() { cout << "基类的 普通函数 My::fun()" << endl; } void fun(int n) { cout << "基类的 普通函数 My::fun(int n)" << endl; } ...
// 2) Assignment using member function insert() and STL pair Employees.insert(std::pair<string,int*>("David D.",&c)); //makes 3 "Invalid memory access" // 3) Assignment using member function insert() and "value_type()" Employees.insert(map<string,int*>::value_type("John A.",...
Sets the name of the event asnameand constructs an object of typeTby calling constructorT(Args...). The object is emplaced in the storage of the event. This operation is somewhat similar toemplacemethod ofstd::vector. For exampleevent.construct< std::pair<int,double> >("PairEvent", 1,...
1有如下程序:#includeusing namespace std;class Pair{int m,n;public:Pair(int j,int k):m(j),n(k){}int get( ){return m;}int get( )const{return m+n;}};int main( ){Pair a(3,5);const Pair b(3,5);cout 2有如下程序: #include using namespace std; class Pair{ int m,n; ...
有如下程序:#includeusing namespace std;class Pair{int m;int n;public:Pair(int i,int j):m(i),n(j){}bool operator>(Pair p)const;//须在类体外给出定义};int main( ){Pair p1(3,4),p2(4,3),p3(4,5);cout A. bool Pair::operator>(Pair p)const{if(m!=p.m)return m>p.m;...
bf_gpu.build/RelWithDebInfo/gpu_shader_create_info.o *** Templates that took longest to instantiate: 11172 ms: fmt::detail::vformat_to<char> (142 times, avg 78 ms) 6662 ms: std::__scalar_hash<std::_PairT, 2>::operator() (3549 times, avg 1 ms) 6281 ms: std::__murmur2_or...